Boat-detaching apparatus



(No Model.)

I BOA-T DETAGHING APPARAUS. A l 4 No. 247,976. Patented Oct. 4,1881.

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UNITED STATES PATENT OFFICE.

BAT-DETACHING APPARATUS.

SPECIFICATION forming part of Letters Patent N0. 247,976, dated October4, 1881.v

Application led July 5, 1881. (No model.)

To all whom t may concern Beit known that I, ALBERT WILLIS, of Colusa,in the county of Colusa and State ot' Galifornia, have invented certainuseful Improvements in Boat-Detachin g Apparatus, of which the followingis a specification.

The object of my invention is to provide a new and improved device forlowering and detaching life-boats rapidly, safely, and in a simplemanner.

The invention consists in an upright at each end of' the life-boat, tothe top of each of which uprights a short arm or beam is pivoted, the

loose end of which passes into an aperture in a beam pivoted to thelower end of lthe upright, this upper beam being held in the aperture bya safety-chain and by a pintle passing through a ring attached to astring or chain fastened to the davitso that when this string is drawntant by the descending of the boat the ring pulls the pintle out of itsaperture, so that the lower beam can drop when relieved of itsstrain-that is, when the boat 'l'loats--th us permitting the upper armto swing upward and the ring of the pulley-block to slide from a hook onthe upper pivoted beam, whereby the boat is detached from the pulley.

In the accompanying drawings, Figure l is a longitudinal sectionalelevation of a boat provided with my improved detaching apparatus. Fig.2 is a plan view of-one of the uprights and the short arms or beamspivoted thereto.

Similar letters of reference indicate corresponding parte.'

An upright, A, is -tirmly fastened in the bottom ot' the boat B at eachend of the same, and a short beam or arm, 0, having-its free endrounded, is pivoted to the top of each beam A. A beam or arm, D, ispivoted to the bottom of each post or upright A, and the free end ot'this arm D is provided with an aperture, E, into which the rounded endof the arm C ts, these two arms being held together by tached tothedavit O. A hook, L, extending toward the outer endof the arm C, isfastened on the upper surface of this arm. A ring, M, on thelower endofthe pulley-block N is passed over thishook L, andthe pulley-block isheld to the post A bynieans of a safety-chain, P, attached to the blockN, and by a staple, Q, attached to the' end of the chain P and ittin gin grooves R in the post A.

S is acushion, block of rubber, or springs at the foot ofthe upright A.

T are the ropes for lowering the boat.

The. safety-chains can be dispensedwith, if desired; but I prefer to usethem, audit' the device is not to work automatically the pulleyblock canbe attached in a diderent manner; but I prefer the constructiondescribed, the above remarks only serving as indications for possiblemodifications.

The operation is as follows: The rounded end ot the arm C is passed intothe aperture of the arm D, and is held in this position by the weight ofthe boat B, the arm G heilig slightly inclined downward, so that thering M cannot slip from the hook L. As the boat is lowered the ring H,which is held to the davits by the cord K, draws the pintle G out of theaperture J but this does not cause the arms G and D to separate, as theweight of the boat holds them in their position; but as soon as the boatB begins to iioat the strain is taken from the arm D, which drops, andthe arm C is vdrawn upward, as shown on the right side of Fig. l,permitting the ring M to slide from the hook L, whereby the boat isdetached from the pulley. The cushion-block S prevents the arm D fromdropping on .the tiloor of the boat B and damaging the same.

rlhis device operates automatically, and will vnot be released until theboat touches the water. The staple Q is drawn out of the grooves It assoon as the block M is separated from the beam C.

I claim as new and desire to secure by Letters Patent- 1. Thecombination, with thelowering-tacklc and uprights A, ofthe short arms C,with rounded ends pivoted to the top, and the arm D, with aperture E,pivoted to the bottoms of said up- Having thus fully described myinvention,`

IOO

rights, the short chain F, and the pintle G, as armsGandD,provided withnrounded end and shown and described. an aperture, respectively, andpivote'l to the 2. In u bont lowering` and detuching,r device, upright Aofthe pintle G, the ring H, the cord [5 the combination, with thenprights A, ot' the K, the hook L, the ring M, the staple Q, the arms Cund D, provided with a rounded end chain P, and thebont-loweringtaekle,substan and an aperture, respectively, und pivotedto tially as herein shown and described, und for the ulviright A of thepintle G, the ring H, cord f the purpose set forth. K, l.1nd of theboat-lowering` tackle, substan- ,1 tially as herein shown und described,and for ALBERL WILLIS' 1o the purpose set forth. Witnesses:

3. In a boat lowering` and detaching device, J. M. PICKETT,

the combination, with the uprights A, of the l JOHN T. HARRINGTON.

